He didnt ask for mistake-free games. He didnt demand that his players never lose. He asked for full preparation and full effort from them. Did I win? Did I lose? Those are the wrong questions. The correct question is: Did I make my best effort? If so, he says, You may be outscored but you will never lose. Carol Dweck, Mindset: The New Psychology of Success

Mindset by Carol S. Dweck